glLighti(GL_LIGHT0, GL_CONSTANT_ATTENUATION, (GLfloat)1);
glLighti(GL_LIGHT0, GL_LINEAR_ATTENUATION, (GLfloat)0.5);
glLighti(GL_LIGHT0, GL_QUADRATIC_ATTENUATION, (GLfloat)0);
glLighti(GL_LIGHT0, GL_CONSTANT_ATTENUATION, (GLfloat)1);
glLighti(GL_LIGHT0, GL_LINEAR_ATTENUATION, (GLfloat)0.5);
glLighti(GL_LIGHT0, GL_QUADRATIC_ATTENUATION, (GLfloat)0);